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Finding the Fourth Proportional to 809,352.80, 1,214,029.20 and 388,527.20

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Solution

The fourth proportional to 809,352.80, 1,214,029.20 and 388,527.20 is: 582,790.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,352.80 : 1,214,029.20 = 388,527.20 : x
  2. Step 2: Convert to fraction form
    809,352.80/1,214,029.20 = 388,527.20/x
  3. Step 3: Cross multiply
    809,352.80x = 1,214,029.20 × 388,527.20
  4. Step 4: Simplify right side
    809,352.80x = 471,683,365,794.24
  5. Step 5: Solve for x
    x = 471,683,365,794.24/809,352.80
  6. Step 6: Final answer
    x = 582,790.80

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